Linera introduces an elastic multi-chain protocol to tackle Web3 scaling issues by enabling unlimited parallel microchains owned by users and applications, secured by a single decentralized validator set using delegated Proof-of-Stake. This architecture separates block proposal from validation, allowing for low-latency execution and congestion-free cross-chain messaging via commutative inboxes. Developers can deploy Rust/Wasm code across these microchains, offering users gas-free interactions on their personal chains and unlocking the potential for instant and scalable Web3 applications with early benchmarks showing over 100K TPS.